Attaching the hydraulics to the arm.

Step 1 Obtain one small syringe and a wooden axle. Slide the wooden axle through the hole on the plunger as shown on the right

Step 2 Pass the wooden axle through the small holes at the end of the body and glue into position.

Step 3 Using a screw eye make a hole in the final thin axle. Remove the screw eye and slide the thin axle through the holes found half way up the arm and reattach the screw eye to the thin axle.

Step 4 Slide two small rings at each end of the axle and glue into position.

Step 5 Now place the nozzle of the syringe through the screw eye and attach the tubing. Place a drop of glue to secure the screw eye to the axle.

Click To see what the assembly looks like.